Device and method for bone adjustment with anchoring function

Patent metadata

Field	Value
Publication number	US-9962199-B2
Application number	US-200913123536-A
Country	US
Kind code	B2
Filing date	Oct 29, 2009
Priority date	Oct 31, 2008
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A method and a device for bone adjustment in a mammal is presented, wherein a device is implanted in the medullar cavity of a bone in the body of said mammal, said device being a device exerting a force to anchoring devices anchored ins aid bone. The method and device has utility in therapeutic and cosmetic bone adjustments, including the lengthening, reshaping and realigning of bones, for example in the correction of congenital deformations, restorative orthopedic surgery and the like.

First claim

The invention claimed is:

1. A device for bone adjustment in a mammal, comprising two or more anchoring devices adapted to be attached to a bone in said mammal, and an adjustment device for exerting force on said anchoring devices adapted to adjust the distance between or orientation of at least two of said anchoring devices,
wherein said anchoring devices and said adjustment device are adapted to be implanted intramedullary in said mammal and wherein said adjustment device is constructed to postoperatively adjust said distance or orientation,
the device further comprising an operation device, wherein the adjustment device is operated by the operation device, which comprises a motor, wherein the motor comprises a motor or device positioning system, such as a tachometer or a sensor input to see the position of the adjustment device,
wherein the device further comprises a gearbox connected to the motor or a motor package, wherein an outgoing speed from the motor package is lower than the speed by the motor alone, accomplished by the gearbox, wherein the outgoing speed of the motor package is adapted to be decreased to less than 10 turn per second during normal operation,
wherein the device further comprises a control device, wherein the operation device is controlled by the control device comprising an internal control unit adapted to be programmable wirelessly from outside the patient's body, and
programmed to regulate the device according to a pre-programmed time-schedule, and
programmed to regulate the device according to input from the sensor or another sensor or measuring device sensing any possible physical parameter of the patient or any functional parameter of the system.

2. The device according to claim 1 , wherein the adjustment device comprises a hydraulic device for said bone adjustment, to control the amount of force exerted by the device onto said anchoring devices, wherein the hydraulic device is comprising at least one of:
a cylinder and piston,
a mechanical multi step locking mechanism, locking the hydraulic device in its new position after adjustment,
a mechanical multi step locking mechanism, locking the hydraulic device in its new position after adjustment, wherein the mechanical multi step locking mechanism comprises at least one of a sprint, a elongated structure using the principle of saw teeth, flanges, barbs or a bonnet band, a nut, a gearbox, or a spring loaded locking principle,
hydraulic fluid and a reservoir containing said fluid, adapted to move said fluid to said adjustment device,
hydraulic fluid and a reservoir containing said fluid, adapted to move said fluid to said adjustment device, wherein the hydraulic fluid is moved from said reservoir to said adjustment device by using a pre-pressurized reservoir or a pump,
a device positioning system such as a fluid volume or flow measurement or any other sensor input to see the position of the adjustment device.

3. The device according to claim 2 , wherein the device comprises a control device.

4. The device according to claim 3 , wherein said control device follows a program of incremental changes, set before the device is implanted.

5. The device according to claim 3 , wherein said control device follows a program of incremental changes, communicated to the control device after implantation and/or during the treatment.

6. The device according to claim 3 , wherein said control device comprises an external control unit and an implantable receiver suitable for wireless communication with said external control unit, having a transmitter located outside the body.

7. The device according to claim 1 , wherein said two or more anchoring devices are adapted to at least one of:
engaging and stabilizing the anchoring device using a thread in relation to the bone,
engage and carry weight only on the outside of the bone,
engage and carry weight only on the inside of the bone, and
anchoring a relative rotation of the adjustment device including at least two parts adapted to rotate in relation to each other.

8. The device according to claim 7 , wherein said at least two anchoring devices are chosen from a screw, an adhesive, a barb construction, a saw-tooth construction, an expandable element, combinations thereof or other mechanical connecting members.

9. The device according to claim 1 , wherein said adjustment is the lengthening of a bone, the healing of a fracture, the changing of a bone angle, the reshaping of a bone, the compression of a bone, the torsion of a bone or a combination thereof.

10. The device according to claim 1 , wherein the force exerted by the adjustment device is at least one of:
a longitudinal force, extending the length of the bone,
directed to the end portions of the medullar cavity,
a longitudinal force, adjusting the angle or curvature of the bone,
applies torque to the bone, adjusting the torsion of the bone along its longitudinal axis.

11. The device according to claim 1 , wherein said device is flexible.

12. The device according to claim 1 , wherein the control device at least one of:
follows a program of incremental changes, set before the device is implanted, and
follows a program of incremental changes, communicated to the control device after implantation and/or during the treatment.

13. The device according to claim 1 , wherein said adjustment is adapted to perform: the lengthening of a bone, the compression of a bone, the healing of a fracture, the changing of a bone angle, the reshaping of a bone, a correcting of a limb discrepancy caused by a congenital condition or deformation, correcting of a limb discrepancy caused by previous trauma, the changing of the curvature of a bone, the changing the torsion of a bone, the changing the angle between the diaphysis and the epiphysis, the changing the thickness of a bone, the changing of the curvature of the spine, the adjoining of vertebrae adapted to change the curvature of the spine, and the adjoining of vertebrae adapted to relieve a herniated lumbar disc or the like.

14. The device according to claim 1 , wherein said adjustment device is, at least one of:
adapted to implement torsion of a bone,
adapted to change the angle of a bone,
adapted to have at least two parts to rotate in relation to each other, wherein said adjustment device comprises at least two parts, the relative rotation being anchored by at least two anchoring devices,
adapted to have at least two parts angled in relation to each other, wherein said adjustment device comprises at least two parts,
adapted to change the curvature of a bone,
adapted to change the curvature of the spine,
adapted to adjoining vertebrae, adapted to change at least one of, the curvature of the spine and to relieve a herniated lumbar disc or the like, and
adapted to non-adjoining vertebrae, adapted to change at least one of; the curvature of the spine and to relieve a herniated lumbar disc or the like.

15. The device according claim 1 , wherein the control device is adapted to, at least one of:
control incremental changes of the adjustment device, communicated to the receiver after implantation and/or during the treatment by using an comprised external control unit and an implantable receiver suitable for wireless communication with said external control unit, having a transmitter located outside the body,
regulate the device non-invasively by manually pressing at least one subcutaneous switch, whereby the operation of the device is switched on and off, further comprising an implantable internal energy source for powering implantable energy consuming components of the apparatus, and
regula

Assignees

• Forsell Peter

Inventors

• Forsell Peter

Classifications

• A61B17/7258

  with laterally expanding parts, e.g. for gripping the bone · CPC title

• A61B17/7216 Primary

  for bone lengthening or compression (A61B17/7258 takes precedence) · CPC title

• A61B17/7062

  Devices acting on, attached to, or simulating the effect of, vertebral processes, vertebral facets or ribs (rib fixation devices A61B17/8076); Tools for such devices · CPC title

• A61B2017/00212

  using remote controls · CPC title

• A61B17/7016

  electric or electromagnetic means · CPC title